Printing of animal fibers with mordant dyestuffs



' ing operation quite' apart from a short steaming operation,

animal fibers are I a sufficient quantity of in free state desiredresult can these results can Patented a. 2'2, 1935 PRINTING or MORDAN'I'Philippe Brandt, flrmDuran 82 land.

I No Drawing.

claims.

Acid mordant dyestufls with chromium mordants can, up to the present,when used for printing wool, only be suinciently fixed by' a steamoflong duration, namely 0! one hour and even longer. For certain articles,however, along steaming operation is a disadvantage, the consumption oftime and of steam, in that in overprinting on light ground shades,ior'example, the ground shade easily becomes yellow.

It has now been found that it is ssibleto fix acid mordant dyestuffs onwool co pletely by such as steaming for 8 minutes in a Mather-Flattapparatus. For this purpose it has been found necessary to use in theprinting paste an increased or substantial proportion of a non-volatileorganic acid, such as oxalic acid, tartaric acid, citric-acid, adipicacidand the like, whereby the acid conditions which promote the fixationor the 'dyestufl on given throughout the whole steaming operation. Thesimplest way is to add such an acid to the printing. paste. Printingpastes containing such acid are often insufliciently stable. The also beattained by producing the, said acid in the printing pastes themselvesby dissociation of salts thereof, for instance of ammonium salts ofsuchacidsor corresponding chromium salts like chromium oxalate, chromiumtartrate, chromium citrate, during the steaming operation. The variousways of working may also be combined. Thus, for example, the addition 0!free acid to a printing paste containing already an ammonium salt or achromium salt of such an acid, or both, is suitable for the pur- Dse.:oi the present invention.

Besideshaving the advantage that the duration of the steaming processoflers it shortens operation, the new other advantages in so far as the-prints obtained are much fuller and-have an improved iastness torubbing. In most cases simultaneous use of urea or in: Past The newprocess cannot only beapplied to wool, but also to silk, in general toanimal fibers. It gives good results not only in proper printing, but.also in the production 0! padded dyeings thio-urea in the print- .on theaforesaid fibers. r

In hitherto known printing prescriptions, the I use of oxalate ofammonia for examplehas already been indicated. This body, however,- wasevidently used in quantities insufllcient tor the Application my German!when an increased quantity of oxalate of am- 1 monia-for instance atleast 4 per cent or the simple manner a problem set to the further beenhanced by the Annual. mans wrrn nrrs'rur'rs Mulhouse, d HugueninFrance, auignor to S. A Band, Switzeh a, rose, Serial No. May 12. 1932(C1; 8- purpose of the present invention, since for a complete fixationof the dyestuffs a steaming op-' eration of 1-2 hours wasalwaysnecessary. Contrarily to this, according to the present process,

, said salt for 3 per cent dyestuiI--is added to the printing paste,already by a short steaming-8 1 minutes-a complete fixation is attained.In this 'ago has been solved. The same result is obtained, when theother cited non-volatile organic acids, respectively their dissociablesalts, like ammonium salts, chromium salts are used. 5 The improvedprocess is illustrated by the 101- lowing examples: g

Example 1 Parts Dyestufl according to Example 1 of U. S. Patent No.1,895,545 (sulphonated anilido compound of the. galloqgoanine dyestuflfirom' nitrosodiethyl-metaluidine and gallic acid) Urea 60 Hot water 190Tragacanth thi"kening 550 Ammonium oxalate (solid) 50 these ingred entsbeing mixed, heated up for dissolution and then cooled down, there A.upon there is added 1 Chromium acetate solution (20 B.). 90 9 Example 25 Chromocltronlne R (see Color Index No.

441)- Urea a 90 Hot water 170 40 Tragacanth thiclrening 600 Ammoniumoxalate (solid) are heated up for dissolution and cooled down, whereuponthere is added Chromium acetate solution (20 B.) 90 45 1000 Example 3 1v cl trgnorhcdine BR (see Color Index No.

Urea

Water 1'10 'n-agacanth' thickening 600 practice long 10 Ammonium oxalate(solidY are heated up to dissolve and cool whereupon there is addedChromium acetatesolution (20 B.) 90

Example 4 Parts Chromocitronine R (see Color Index N '30 Water 260'I'ragacanth thickening 570 Ammonium tartrate (solid) 50 are heated upto dissolve and cooled down, whereupon there is added Chromium acetatesolution (20 B.) 90

1000 Example 5 I. 'Parts Chromocitronine R (see Color Index No.

I so Urea 60 Water 220 Tragacanth thickening 600 onium oxalate (solid)50 Chromium tartrate (solid) 40 The thus prepared printing colours areprinted dried, steamed for 8 minutes, washed blue, yellow or rose printsfast to rubbing are obtained. In a similar way prints on natural silkare produced.

What I claim is:--

1. A process for producing prints or dyeings about '8 2. A process forproducing prints or dyeings on animal fibers with acid mordant dyestufisby steaming, said prints or dyeings being steaming, said prints ordyeings being fast to rubbing and of deep intensity, which consists inadding to the printing paste or besides the usual ingredients, at least4- per cent prepared printing paste or padding solution and fixing thedyestuii on the fiber by a steaming for about 8 minutes.

cent of dyestuif, when heated,

condition is maintained throughout steaming, 25

producing prints or dyeings 4. A process for producing prints or dyeingson animal fibers with acid mordant dyestuffs by steaming, said prints ordyeings being fast to rubbing and of deep intensity, which consists inadding to the printing paste or padding solution, besides the usualingredients, a dissociable salt of a non-volatile organic acid, in aquantity, capable of yielding at least 4 per cent'of acid for 3 per centof dyestufi, when heated, so that the Pacid condition is-maintainedthroughout steaming, in combination with an urea compound. printing orpadding the fabric with the thus prepared printing paste or paddingsolution and fixing the dyestuff on the fiber by a -steaming for about 8minutes.

mal fibers with acid mordant dyestuifs by steaming, said prints ordyeings being fast to rubbing and of deep intensity, which consists inadding to the printing paste or padding solution, be- 2 sides the usualingredients, an ammonium salt of a non-volatile organic acid in aquantity capable of yielding at least 4 per cent of acid for 3 per sothat the acid printing or padding the fabric with the thus preparedprinting paste or padding solution and fixing the dyestufi on the fiberby a steaming for about 8 minutes.

' 6. A process for producing prints or dyeings on 0 animal fibers withacid mordant dyestuffs by steaming, said prints or dyeings being fast torubbing and of deep' intensity, which consists in adding to the printingpaste or padding solution,

besides the usual ingredients, ammonium oxalate 35 in a quantity capableof yielding at least 4 per cent of acid for 3 per cent of dyestufi, whenheated, so that the acid condition is maintained through- 1 outsteaming, printing or padding the fabric with the thus prepared printingpaste or padding solu- 40 tion and fixing the dyestuff steaming forabout 8 minutes.

7. A process for producing prints or dyeings on animal fibers with acidmordant dyestufi's by on the fiber by a steaming, said prints or dyeingsbeing fast to rub- 45 bing and of deep intensity, which consists inadding to the printing paste or padding solution, be-

- "sides the usual ingredients, a chromium salt of a tion is maintainedthroughout steaming, printing or padding the fabric with, the thusprepared printing paste or padding solution and fixing the dyestufl. onthe fiber minutes.

8. A process for producing prints or-dyeings on animal fibers with acidmordant dyestuffs by the thusprepared printing paste or padding solu--tion and fixing the dyestufl on the fiber by a steaming for about 8minutes.

9. A process for producing prints or dyeings on 16 5. A process forproducing prints or dyeings on by a steaming for about 8 55 cent ofdyestufl, when heated, so that the acid condition is maintainedthroughout steaming, in combination with an urea compound, printing orpadding the fabric with the thus prepared printing paste or paddingsolution and fixing the dyestufl on the fiber by a steaming for about 8minutes.

10. A process for producing prints or dyeings on animal fibers with acidmordant dyestufls by steaming, said prints or dyeings being iast torub-,

of a non-volatile organic acid in a quantity capabie oi yielding atleast 4 per cent of acid for 3 per bins and of deep intensity, whichconsists in adding to the printing paste or padding solution, be-

sides the usual ingredients, ammonium oxalate in a quantity capable oiyielding at least 4 per cent oi acid for 3 per cent 01 dyestufl, whenheated, so that the acid condition is maintained throughout steaming, incombination with urea, printing or padding the fabric with the thusprepared printing paste or padding solution and fixing the dyestufl onthe fiber by a steaming for about 8 10 minutes.

FHIIJPPE BRANDT.

